TEU 315, TEU 315-ExTEU 325, TEU 325-Ex

Transmitter fortemperature anddirect current variables

Manual 42/11-34 EN Rev. 05

Contents

TECHNICAL DESCRIPTION Page

31 Application

2 Technical data (acc. ta VDI/VDE 2191) 3

7789

3 Mode of operation. 3.1 General principle of operation.. 3.2 Application circuits. 3.3 Measuringcircuitoptions 3.4 Internal reference junction compensation and

plug-in lead balancing resistor 9

10

10

11

11

4 Construction 4.119/'plug-incard 4.2 IP 20 surface-mounting case

4.3 IP 54 fjeld enclosure

OPERATING INSTRUGTIONS

12

12

5 Mounting and connecting instructions

5.1 Mounting the instrument. 5.2 Installing the measuring signal.

output signal and power supply lines . 13

13

13

6 Commissioning 6.1 Switching on the instrument.

13

13

7 Alarm signalling unit. sensor break signal contact

7.1 Setting the alarm value

with relay or transistor output.

14

14

14

8 Measuring circuit options. 8.1 Measuring circuit break monitor

8.2 Strain gauge option. measuring circuit 395

Note

This apparatus has been designed and tested in accordance

with DIN VDE 0411 Part 1 ..Safety Requirements for Electronic

Measuring Apparatus... and has been supplied in a safe con-

dition. The information and warnings given below must be

followed by the user to ensure safe operation and to retain the

apparatus in a safe condition.

-Before any other connection is made. the protective ground

terminal shall be connected to a protective conductor.

-Before switching on the apparatus make sure it is set to the

voltage of the power supply.

-Any interruption of the protective conductor inside or

outside the apparatus or disconnection of the protective

ground terminal is likely to make the apparatus dangerous

Intentional interruption is prohibited

-When the apparatus is connected to its supply. terminals

may be live. and the opening of covers or removal of parts

(including those to which access can be gained by hand)

is likely to expose live parts.

-The apparatus shall be disconnected from all voltage

sources before it is opened for any adjustment, replace-

ment. maintenance or repair

-Any adjustment. maintenance and repair of the opened

apparatus under voltage shall be avoided as far as possible

and. if inevitable, shall be carried out by a person who is

aware of the hazard involved.

-Capacitors inside the apparatus may still be charged even

if the apparatus has been disconnected from all voltage

sources.

-Make sure that only fuses with the required rated current

and of the specified type are used for replacement. The use

of rewired fuses and short-circuiting the fuse-holder is

prohibited.

-Whenever it is likely that the protection has been impaired.

the apparatus shall be made inoperative and be secured

against any unintended operation.14

15

15

15According to the regulation DIN VDE 0411 an interruption in all

poles ot the power supply lines has to be provided. This

interruption can also be provided tor a group ot instruments it

the installation has the required voltage and current carrying

capacity.

9 Lead balancing. 9.1 Lead balancin9 for two-wire circuit. 9.2 Lead balancin9 for temperature difference

measurement (measurin9 circuit 378) 9.3 Lead balancin9 for resistance teletransmitters.

10 Measuring range modification

10.1 General information .

15

15

11 Testjacks

12 Explosion-proof version 18

1813 Trouble shooting

14 Maintenance 18

1815 Packing instructions

1916 Dimensional drawings

(dimensions in mm)

Subject to technical changes

Reprint. reproduction or translation of this Manual or partsthereof are not permitted without our prior consent

2

IIP 20 surface IIP 54 fjeldmountjng case enclosure

Gase and mounting

Electricalconnections

32poleconnector,toDIN 41612

typeDorf

63 mm tabconnectorsor screwterminalstor 2.5 mm2

ScrewterminalsTor 25 mm2

Degree cfpratectian taDIN 40050

CannectianScrew terminalsTab cannectars

IIPOO 1054

JP20

IPOO I

olP 20 via insu-1

lating sleevesJ

Class of protec-tion to VDE 0411

IEC 348. notEx-versionTransmitters with measuring circuit 395 (strain gauge measu.

rement) have 0.3 W greater power consumption.

Required connection

performance of

power supplysource P effectice = 1.5 x value of power con.

sumption. current drain not sinusoidal

3fter installationIn 19" sub-rack

Connection of a functional earthin9 is necessary forradio interference suppression. The measurin9 cir-cuits are then insulated according to class of pro-tection II

Ex-version

*) For Ex-version on I y fuses with fuse-elements provided with a winding are

tolerated

Insulation groupto VDE 0110

Color

Oper orientation

I,With protectice conductorconnection

C3) IC3) C3)

AAL 7032 AAL 7032 RAL 7032

Handle at top or bottom Cable glandst'ront panel vertical underneath

Weight I Appr 06 kg I Appr 10 kg Appr. 20 kg

Test volttage Mains with respect to input/output 3kV.

to VDE 0411 For version with electrical signal isola-

tion, input with respect to output 3 kV,

for test jacks 0.75 kV, for Ex.A and Ex.B

3 kV.

Unsolder capacitors (see Fig. 7, Pos. 11) or disconnect earth

connection (see Fig. 5, Pos. 8) during voltage tests.

Characteristics at equilibrium under nominal conditions

Basic shape of

characteristic Linear

Terminal-based conformity

Error limit <:t05%2) referred to output span,

half tolerated as "option"

<:t 1% with spans <5 mV,

<7Q or<251JA

Contained in non-linearity.

Alarm value deviation:

Measuring circuit 352.1. ..3: <0.3% not

available with "half-

tolerance"for start of range < 300 ° C

<0.5% for type S

<1% for type R

352.4: error de-

pends on

shape of

curve

365: <0.2%

378, 395. <0.3%

372, 374. <0.2% for

temp.>o°C

All other measuring

circuits <0.1%

<0.1 %. referred to output span

Non-linearity

Mechanical capabilities

Tests to DIN IEC 68, Part 2-6, Part 2-27

In operation

Shock 30g/11 ms

Oscillation 2.5g/::!: 0.16 mm/5 ...150 Hz

Seismic stress class II to DIN 40046 Part 55

Oscillation 2g/::!: 10 mm/5 ...35 Hz

') Max +60 °C (application class JUF) for TEU 35-Ex with 110/127/220 V ACpower supply. for ambient temperature permitted for equipped 19 " sub-racksee page 12

2) Incremental error with internal reference junction compensation 05 K for19 " plug-in module. 05 K for surface-mounting case. 10 K for field enclosure

3) At points with total insulation at leastthe simple values of insulation groupC arerealized forcreepage distances 8tatic error

5

Construction 119"olug-in card

Nominal conditions

Ambient

temperature

Tolerated

temperature

fluctuation during

measurement

Power supply

Time response (dynamic response)

Abrupt change from 10 to 90 %. residual error :t 1 %. aperiodic

setting18...28 °C

Electrical isolation

With Without

Measuring ranges

5 mV I >5 mV 1...5mVI >5mV

2K

Valtage :t2%

Harmonic content ~5%

Rated frequency :t0.5%

No harmonics with direct valtage

supply

For IA: RA max

For UA: RA min

~ 30 minutes

Response time Ta

Recovery time afterinterruption ofmeasuring circuit

300 ms 200ms 300ms 200 ms

.oad lOs 6s 70 s 12 s

Warm-up timeResponse time für

Measuring circuit 365 with filter 1 <8 s. with filter 2 <0.7 s

Lang time effect <0.2%/year

Characteristics at equilibrium in the event of deviation fromthe nominal conditions

Effect of ambient

temperature ~0.2%/10 K on zero reterred to

~ 0.1 %/10 K on span output span

Incremental error with built-in rete-

rence junction compensation approx.

0.5 °C/10 K.

with Pt 100 IEC tor spans

<50 K 0.05 °C/10 K

Explosion protection

Factory code 49/11-38 Ex

Type test

certificate PTB No. Ex-84/2123X

Effect of

power supply <0.1%/10% valtage fluctuatian

<0.1% with 48...62 Hz frequency

fluctuatian

Effects at input

Effect af interference valtage af

50 Hz balanced-made

alternating inter-

ference valtage < 0.1 % at 3 x span,

increased residual ripple

Mounting outside the hazardous area

Ambient

temperature Up to + 70 °C

Monitoring loop Up to 220 V. up to 1 A

Type of protection of input circuit: intrinsic safety

EEx ia IIC or EEx ib IIC

50 Hz unbalanced

alternating inter-

ference valtage

unbalanced direct

interference

<0.1% up ta max. 250 Vrms (effJ

<0.1% up ta max. 250 V

<0.05% within load range

<0.5% from 2 kO...~

Effects at output

Effect of load

on current output

on voltage

output

Effect of external

voltage on

current output <0.1% with Uext ~15 V

(7.5 V at output :t. 10 mA. 10 V

without electrical isolation)

Output circuit in type of protection EEx ib II C forthe connectionof passive intrinsically safe circuits.

This circuit is electronically limited.

Effect af inter-

ference valtage <0.1% per 250 V (with electrical

isolation)

6

With measuring circuit 355 and 365 care must be taken that no

current overloading occurs in the input current circuit; there-

fore an incoming current limitation, e.g. a fuse « 2 A) is to be

provided.

Measuring circuits 381. 382

In current measurement the input current tc be measured is

switched tc a shunt and thereby reduced tc a vcltage measure-

ment.

Measuring circuits 371, 372

These measuring circuits are designed for connection to

Pt 100 IEC resistance thermometers in two and four-wire cir-

cuit. Whether the output current is proportional to the change in

resistance or the change in temperature can be specified

through the wiring (solder link). If a resistance thermometer is

connected in four-wire circuit, the four-wire impedance con-

verter option is always required in addition. with or without

thermometer and wire break monitor.

Linearization (measuring circuit 372) is effected by a Pt 100

current dependent on the amplifier drive level. The current sent

through the resistance thermometer is approx. 2.4 mA.

Measuring circuits 373. 374

Measuring circuits 373, 374 are provided for connecting

Pt 100 IEC resistance thermometers in three.wire circuit. Here,

too, it can be specified through the wiring whether the output

current is proportional to the change in resistance or the

change in temperature. Linearization (measuring circuit 374) is

accomplished in the same way as for measuring circuit 372.

The bridge supply current is approx. 2.4 mA.

3.2 Application circuits

Matching to type of measurement and span is accomplished

with plug-in range units that are referred to by way of measu-

ring circuit numbers. In principle all measuring circuits are

interchangeable, it being necessary to note the following:

Types TEU 315, TEU 315-Ex are supplied with basic adjustment.

The range unit is therefore labelied "with basic adjustment".

Basic adjustment is not available for types TEU 325. TEU 325-

Ex.

In transmitters with input test jacks. range unit interchange is

on I y permitted for the measuring circuits allocated in the table

in Section 11.

For transmitters without basic adjustment. instrument and

range unit are calibrated joint I y in the factory. Readjustment is

therefore necessary if the range unit is exchanged (see Sec-

tion 10).

In TEU 315 transmitters and range units that are both labelIed

"with basic adjustment". the range units can be exchanged

without recalibration The error limit of :f: 0,5 % is retained.

The range units are interchangeable and have an adjustable

span (coarse with solder links. fine with potentiometers).

Measuring circuit 352 (thermocouple output signallinear with

temperature) has a permanently adjusted range. The range can

be set to smaller spans with two fixed resistors.

The output signal (0/4. ..20 mA) is also defined by the range

unit.

For a :f: 10 mA bipolar current output. 0. ..5 mA. 0. ..10 mA.

20. ..0 mA. 20. ..4 mA output signal, orO ...10 Vvoltage signal

an additional module is required. The measuring range is chan-

ged in the same way as for the version with 0. ..20 mA output

signal.Measuring circuit 378

Measuring circuit 378 is used for resistance differenGe measu-

rement with two resistanGe thermometers. EaGh Gurrent-fed

thermometer forms a "half bridge", the resistanGe differenGe

being amplified and Gonverted to a linearized output signal in

the operating range.

Measuring circuit 391

Resistance teletransmitters are supplied with a constant

current of approx. 0.76 mA or 0.3 mA. The measured voltage

generated at the teletransmitter as a function of the position is

picked up between the negative connection of the bridge cir-

cuit (ground) and the slider and converted to a proportional out-

put signal. As only the negative lead (a4-11 : ,teletransmitter

start. see also connection diagram) produces a voltage drop.

which falsifies the measurement result. a balancing resistor of

10 Q (internal or external or balancing with a zero potentiome-

ter) is required for this teletransmitter circuit. Due to the high

internal resistance of measuring circuit 391 and the input ampli-

fier. the resistance of wires c4-12 (teletransmitter pick-up) and

a8-13 (teletransmitter end) is not incorporated in the measure-

ment result.

Measuring circuits 351. 352. 353

Here direct voltages in the mV range are converted by the

compensation method into an output signal proportional to the

input value.

In measuring circuits 351.353 the output variable is linear with

voltage. in measuring circuit 352 ti is linear with temperature.

Measuring circuit 352 is designed primarily for linearizing

thermoelectric voltages.

Reference junction compensation may be accomplished int-

ernally with a plug-in module.

Measuring circuit 355

With this measuring circuit voltages between 150 mV and 150 V

are reduced by a built-in voltage divider and converted by the

amplifier into a standardized output signal.

Measuring circuit 395

This measuring circuit is used for measurement with astrain

gauge in full bridge circuit. If the bridge is supplied with a con-

stant voltage of 4 V, bridge imbalance gives rise to an usable

signal which is amplified.

Measuring circuit 365

This measuring circuit is designed to measure alternating volt-

ages. The primary elements are rotational speed pick-ups or

tachometer generators that generate voltages between 5 V

(rms) and 125 V (rms) .) and lie in the frequency range 5 Hz to

1000 Hz.

The sinusoidal alternating voltage generated by the prjmary

elements is reduced in the measuring circuit input by a built-in

voltage divider and then passed to a circuit that forms the arith-

metical rectifier value. After smoothing by an RC filter the

resulting direct voltage is switched to the input of the measu-

ring amplifier.

*) For intrinsically safe measuring circuit. note type test certificate

8

3.3 Measuring circuit options

3.3.1 Thermocouple break monitor

In order to obtain a defined output signal in the event ofinterruption of the measuring leads or the thermocouple. a"thermocouple breakmonitor" can be built into the transmitter.This consists of an AC oscillator that oscillates with measuringcircuit resistances > 1000 Q and supplies a rectified voltage tothe transmitter input. Depending on the polarity of the rectifierdiode the transmitter output signal can be driven to the lower orupper range value (see Section 8). The break signal contact isalso controlled by this measuring circuit option.

3.4.2 Plug.in 10 Q lead balancing resistor

For resistance measurements in two-wire circuit, resistance

difference measurements and with resistance teletransmitters

a plug-in lead balancing resistor can be built into transmitters of

IP 54 field enclosure construction. (In transmitters of 19" plug-in

card and IP 20 surface-mounting case construction lead balan-

cing must be accomplished with the zero potentiometer at the

range unit or with an externallead resistor,) *)

An externallead balancing unit for 19" plug-in cards can be deli-

vered together with the cap for the female connector (see

Fig.2).

If the range unit has basic adjustment, it is cancelled by this. If

lead balancing is necessary for measurements with resistance

thermometer in three-wire circuit this must be effected exter-

nally.

For measurements with resistance thermometers in four-wire

circuit lead balancing is not required; the line resistance per

wire should not, however. exceed 100 Q.

3.2.2 Two and three wire thermometer and

wire break monitor

In order to obtain a defined output signal in the event of

interruption of the resistance thermometer or measuring leads.a break monitor can be built into the transmitter. This consists

of a threshold switch and an oscillator that operate if the vol-

tage at the resistance thermometer increases to greater than

2 V due to an interruption (the maximum operating voltage is

1 V). The break signal contact is also controlled by this measu-

ring circui~ option.

The option is not required for the two-wire circuit if no thermo-

meter break signal contact is built in and the transmitter is

driven to the upper range value. In this case the transmitter

overranges automatically as a result of thermometer break

For the three-wire circuit the break monitor produces the desi-

red transmitterdrive level if one or more lead wires orthe ther-

mometer are interrupted. The break signal contact is also con-

trolled by the measuring circuit option.

3.3.3 Four-wire impedance converter with and without

thermometer and wire break monitor

This measuring GirGuit option is required if the thermometer is

operated in four-wire GirGuit. The impedanGe GOnverter

enables high-resistanGe voltage piGk-up at the thermometer.

By means of the break monitor the amplifier is Gontrolled in a

defined way in the event of interruption of the thermometer or

the 4 measuring leads. The break monitor is also required for

driving the break signal GOntaGt.

Fig.2 Gap IP 20 for fernale connector with reference junction cornpensetion orlead balencing resistor (see Date Sheet 11-951 ENJ

I-Z.Z' 11

Fig. 3 Internal reference junclion compensation (width 3E. E ~ 508 mm)

, Reference junction compensatjon2 Mounting plate for fitting to ,g.. sub-rack3 Terminals for extension lead wire

4 Solder points for wjring

3.4 Internal reference junction compensation

and plug-in lead balancing resistor

3.4.' Internal reference junction compensation

During measurements with thermocouples. reference junctioncompensation can be performed within the transmitter.

In the IP 54 field enclosure construction the compensation unitis inserted behind the terminal strip. in the IP 20 surface moun-ting case it is inserted in the case socket.

For the '9" plug-in card construction two versions are possible.

, .An additional mounting plate for fitting to the sub-rack. Thisplate has 2 terminals for connecting the extension leadwires. 3 blade-type terminals for the compensation unit and5 solder points for the wiring between mounting plate andconnector assembly of the '9" plug-in card. The maximumline resistance between reference junction compensationunit and transmitter is , Q per wire (see Fig. 3).

2. A cap for the fernale connector with built-in reference junc-tion compensation (see Fig. 2).

The internal reference junction compensation is designedfor 20 °C and can be used forthe differenttypes ofthermo-couple (see Fig. 3).

.) If ba!ancing is effected with an interna! ar externaJ lead balancing resistar.10 O mus! be ca!ibrated inta !he start af range

9

Fig. 5 shows the arrangement of modules on the base board.The disposal ofthe electronics on the base board isthe same in

all constructions.

The 19" plug-in card is provided with a plastic cover that to-

gether with the front panel forms a unit. On the cover is the

rating plate and the coding comb forthe different Ex versions of

the 19" construction with blade connector type D. The mating

part for this coding comb must be fitted to the associated slot

on the 19" sub-rack (see Section 5.1.3.1).

4 Construction

4.1 19" plug-in card

The 19" plug-in card (dimensions 100 mm x 160 mm) is fitted with

a 32-pole blade connector. Except for the plug-in range units

and the measuring circuit options the modules are soldered

into the base board.

Fig. 4 shows the front panel of the 19" plug-in card and the

arrangement of range unit. the manual control elements and the

LED for the built-in alarm signalling unit. The potentiometers for

fine adjustment of start of range and span are integrated into

the range unit and are exchanged if changing the type of

measurement. Test jacks for input with test selector switchl

measure and test jacks for output or alarm signalling unit with

adjustment potentiometer and LED are options that can be

incorporated if ordered (at extra charge).

Test jacks for input

Test selector switch/measure

Plug-in range uni!

Potentiometer lor startol range

Potentiometer for span

Test jacks for output or LEDs and

potentiometer for alarm signal

Fig. 4 Front panel of the 19" plug-in card

10 Plug-in range uni!

11 Test switch/measure12 Test jacks for input13 Sensor break monitor andl

or impedance converter forfour-wire circuit or measur-ing circuit option for straingauge measurement

14 Electrical isolation15 output stage for

:t output or voltage output orreverse action characteristic

16 Ex limitation for input

Fig. 5 Structure of the 19" plug-in card

1 Test jacks for output

or

2 Alarm signallin9 unit

or

3 Sensor break signal contact

4 1 mV or 20 mV amplifier

5 15 V constant voltage source

6 Mains isolator

7 Ex limitation for

power supply8 Ground terminal for

Y capacitor5

9 Blade connector tYpe D or F

10

4.2 IP 20 surface-mounting case

Fig.6 shows the 19" p!ug-in card in an IP 20 surface-mounting

case.

A 19" p!ug-in card is inserted into the plastic case and fastened

with 2 screws. All manual control elements and the range unit

are accessib!e in the front panel. B!ade-type terminals or screw

terminals are attached on the bottom at the side for the e!ectri-

ca! connections.

4.3 IP 54 fjeld enclosure

The transmitter housing protected to IP 54 (Fig. 7) for field

installation is made of Terluran plastic and comprises the base

and the cover (not illustrated).

Transmitter TEU 315/325 in the IP 54 enclosure contains a prin-

ted circuit board with the complete electronics and a terminal

strip forthe electrical connections thatis soldered into the prin-

ted circuit board.

The circuit board is fastened into the enclosure base with 4

screws. With the cover removed, the range unit and the poten-

tiometers for start of range, span and alarm signal are acces-

sible.

Fig. 6 19" plug-in card in an IP 20 surface-mounting case Fig. 7 Transmitter in surface-mounting case protected to IP 54

1 Alarm signalling unit or sensorbreak signal contact

2 1 mV or 20 mV amplifier

3 15 V constant voltage source

4 Mains isolator

5 Switching power supply

6 Terminal strip

7 Range unit

8 Sensor break monitor and/or impedance converter for four-wire

circuit or measuring circuit option for strain gauge measurements

9 Electrical isolation

10 Output stage for 0 5 mA or 0 .10 mAor 10 Vor :t 10 mAor reverse action characteristc

11 Y Capacitors

12 Blade-type terminai for reference junction compensation

11

Type F to DIN 41612 If a direct current relay is connected this must be wired with a

freewheeling diode for both relay and transistor output.

Wiring with an RC element is recommended if an alternating

current relay is connected.

The alternating current relay can be wired in accordance with

the following formula.

UNACR~

~~

,\

Coding pin Refe,ence no 0458650.5 (4}

X= Ccding pin inserted in female ccnnectcr

Blade ccnnectcr drilled tc match female ccnnectcr

0.25 A (R ~ DC resistance of the load)C "' 0.047 IJF where UCN ~ 2 UNAC

Otherwise the general guidelines for the wiring of Reed con-

tacts must be observed !

The relay contacts are not surge voltage proof.

In versions with and without electrical isolation the alarm

signalling unit only operates with the output circuit closed.5.1.4 IP 54 field enclosure

The case is protected to IP 54 and is suitable for field installa-

tion. It must be fastened with the projecting straps (see dimen-

sional drawing page 19 for distance between fastening holes) in

such a way that the cable glands are at the bottom. With the

case cover removed, the electrical connections can be made at

the terminals with wires up to 2.5 mm2.

5.2 Installing the measuring signal, output

signal and power supply lines

\"'1hen Selecting the line material and installing the measuring

signal. output signal and power supply lines, the requirementsof DIN VDE 0100 must be met. VDE 0165 must be observed in

addition for the explosion-proof version.

With measuring circuit 355 and 365 care must be taken that no

current overloading occurs in the input current circuit; there-

fore an incoming current limitation. e.g. a fuse c< 2 A) is to be

provided.

7.1 Setting the alarm value with relay or

transistor output

If the alarm signalling circuit board with relay output or tran-

sistor output is built-in, the alarm value is setwith potentiometer

P1 (see Fig. 8). The procedure for setting the alarm value is as

follows:

a) Set transmitter input value to correspond to the desired

response level of the alarm.

b) Slowlyturn potentiometer P1 as farasthe switching pointof

the respective output. Reaching the switching point is indi-

cated by the LED.

The set switching hysteresis is 0.5% of the span. NO or NC

contact operation can be provided for the switching point as

required. The position of the plug-in jumper for relay or transi-stor output and the LED is shown in Fig. 8.

6 Commissioning

Alarm signalling unit with relay output

6.1 Switching on the instrument

The instrument is operational after switching on the mains

voltage.ln normaloperating conditions the input and output areshort-circuit proof. The transmitter input and output data are

given on the rating plate.

Before a transmitter is switched on the covered range unit

must be inserted.

Important!Removing the range unit with the transmitter switched on isnot permitted.

Adjustment work on the potentiometers in the range box andthe alarm signalling unit may on I y be carried out with insula-

ted tools.

Brl BrZ

Alarm signalling uni! with transistor output

Fig.8 Alarm signalling unit

Br 1 Jumper tor LED

Br 2 Jumper tor relayor transistor output

7 Alarm signalling unit,

sensor break signal contact

The switching currents and switching voltages must not

exceed the maximum values specified in the Technical Data

even briefly. The built-in contacts are not wired.

m1 NC contact operation

W transferable to

~ NO contact operation

13

It a two-way radio is used for communications during commis-

sioning. this must be used with a transmission power of~1 Wat

a minimum distance of 1 rn from the transmitter.

An exception to these conditions is work to change the measu-

ring range. which may be carried out by the operator.s trained

personnel. Note that damage to or short circuiting of resistors

or other components that determine the intrinsic safety must

be avoided without fail. Covering sheets must therefore be

used during soldering work.

-With input circuit IEEx ibJ IIC note certificate of confor-

mity!

Assignment of test jack modules and measuring circuits:

Measuring circuit 351

Measuring circuit 352

Measuring circuit 353

Test jack module

(soldered in) 11335.132

Measuring circuit 355

Measuring circuit 36511335.133

Measuring circuit 371 2-wire

Measuring circuit 372 2-wire

Measuring circuit 373

Measuring circuit 374

Measuring circuit 39 1

11335.134

Measuring circuit 371 4-wire

Measuring circuit 372 4-wire11335.135

11335.136Measuring circuit 381

With a test jack module soldered in, range units can on I y be

interchanged for the measuring circuits assigned in the table.

13 Trouble shooting

If faults occur the cause must be sought in the sensor and its

iead wires.ln the case of voltage measurement this is effected

by testing for continuity and then testing the measured voltage

with a suitable test instrument (e.g. portable compensator).Then test the output signal circuit by connecting an ammeter.

In the case of resistance measurement the resistance to be

measured must be simulated and the current checked at the

transmitter output.

If the transmitter input and output circuits are functioning cor-

rectly, the fault must be sought in the transmitter electronics.

Such an error can be eliminated with the aid of the circuit dia-

gram or by replacing electronic units.

14 Maintenance

Transmitter TEU 315/325 requires no regular maintenance.

15 Packing instructions

12 Explosion-proof version

18

Faults and unusual stress

If it is likely that the protection has been impaired the apparatus

shall be made inoperative and be secured against any uninten-

ded operation.

The protection is likely to be impaired

-if the instrument shows visible damages

-if the instrument does not work

-after long storage time under unfavorable conditions

-after heavy transportation stress.

If the original packing is no longer available, the transmitter

must be packed in a sufficiently large box lined with shock-

absorbing material (excelsior, spun rubber or similar). If ex-

celsior is used, the packed layer should be at least 10 cm on all

sides. Before packing the instrument has to be wrapped in

paper.

For overseas shipment the transmitter must additionally be

sealed airtight in polyethylene at least 0.2 mm thick together

with a dessicant (e.g. silica geD. Furthermore, for this type of

shipment the crate should be lined with a layer of kraft paper.

These packing instructions also apply when returning the

instrument to the manufacturer (e.g. for recalibration, repair).

The input circuit of transmitter TEU 315-Ex and TEU 325-Ex is

approved for type of protection intrinsic safety EEx ib IIC or

EEx ia IIC. The input circuit may be installed in hazardous areas.

taking into accountthe certificate of conformity (see Section 2).

As only the input circuit is intrinsically safe, the transmitter must

be installed outside the hazardous area.

When installing the transmitter, the regulations on electrical

apparatus in hazardous areas (ElexV). the regulations on the

installation of electrical systems in hazardous operating sites

(DIN VDE 0165) and the certificate of conformity (49/11-38 Ex)

must be observed.

If an instrument with a certified intrinsically safe output circuit is

connected to the intrinsically safe input circuit of the trans-

mitter. the intrinsic safety of the connection must be demon-

strated in accordance with DIN VDE 0165.

If the intrinsically safe circuit has to be grounded for functional

reasons by connecting it to the bonding conductor. grounding

may be effected at one point only.

For transmitters TEU 315/325-Ex.C the intrinsically safe input

circuit and the intrinsically safe output circuit must be ungroun-

ded and electrically isolated from each other over their com-

plete course outside the instrument.

Work on an explosion-proof instrument may be carried out by

any person and in any workshop. The apparatus must. how-

ever. be tested and certified by an expert prior to recommis-

sioning. This is not necessary if the work has been carried out

by the manufacturer.s authorized personnel.

In this case the repairer must show the appropriate identifi-

cation. After the repair work has been completed. the data and

repairer.s mark (eg H & B certificate number) must be affixed

to the instrument.

ABB Automation Products GmbHBorsigstrasse 2D-63755 AlzenauPhone +49(0)60 23 92 - 0Fax +49(0)60 23 92 - 33 00http://www.abb.com

Subject to technical changes.Printed in the Fed. Rep. of Germany

42/11-34 EN Rev. 05Edition 07.01